What is the coercivity of a superparamagnetic material, really?

Superparamagnetism should – by definition – infer zero coercivity…… But in reality you can never rule out an arbitrary small coercivity…. In a recent paper we have addressed this issue, and the serious approach is to make a serious effort to quantify it. We hope that we will not be the only one doing this.

R. Andersson et al., "Superparamagnetic [sic] nanofibers by electrospinning," RSC Advances, vol. 6, no. 26, s. 21413-21422, 2016